chemistry tutors

Introduction - A dynamic environment of matter and material surrounds man. Since his birth he has been exposed to these changing surroundings. His curiosity to understand his surroundings and the events occurring around him, has led him to systematically enquire and collect information through expe..

..

..

..

..

..

..

Introduction - Atoms contain three fundamental particles namely electrons, protons and neutrons. Protons and neutrons constitute the nucleus whereas electrons are present in the extra nuclear region of the atom. Chemical changes are caused by rearrangements of outer electrons while nuclei retain th..

Summary - Radioactivity Spontaneous emission of active rays by certain unstable elements. Three types of radiations are: (i) Alpha particles He 2 + ion (Helium nuclei). (ii) Beta - rays - consist of electrons. (iii) Gamma - rays - High energy electromagnetic rays. Emission of alpha particle reduces..

Summary - The symbol of an element is a short way of representing an element . Some symbols are named after the first capital letter of the English name of the element. When there is more than one element starting with the same English capital alphabet, the second letter is also used in its lower c..